Interior light stays on all the time, even when the door is closed; cabinet may overheat slightly.

Unplug the cooler before working on the switch or control board.

• Check door closure: Confirm the door is fully closing and the gasket is not preventing contact with the frame.
• Test door switch: Locate the switch or reed sensor and test continuity while opening and closing the door (or moving a magnet). Replace the Luma door switch if it does not change state.
• Control board: If the switch tests good but the light remains on, the light relay on the main board may be stuck. Replace the Luma main control board.
• Temporary workaround: Remove the interior light bulb or disconnect the light connector until proper repairs are made.